cmake_minimum_required(VERSION 3.3)

foreach(policy
        CMP0023
        CMP0048 # CMake 3.0
        CMP0074 # CMake 3.12
        CMP0077
        CMP0079
    )
    if(POLICY ${policy})
        cmake_policy(SET ${policy} NEW)
    endif()
endforeach()

project(ClickHouse)

include (cmake/arch.cmake)
include (cmake/target.cmake)
include (cmake/tools.cmake)

# Ignore export() since we don't use it,
# but it gets broken with a global targets via link_libraries()
macro (export)
endmacro ()

set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules/")
set(CMAKE_EXPORT_COMPILE_COMMANDS 1) # Write compile_commands.json
set(CMAKE_LINK_DEPENDS_NO_SHARED 1) # Do not relink all depended targets on .so
set(CMAKE_CONFIGURATION_TYPES "RelWithDebInfo;Debug;Release;MinSizeRel" CACHE STRING "" FORCE)
set(CMAKE_DEBUG_POSTFIX "d" CACHE STRING "Generate debug library name with a postfix.")    # To be consistent with CMakeLists from contrib libs.

option(ENABLE_IPO "Enable inter-procedural optimization (aka LTO)" OFF) # need cmake 3.9+
if(ENABLE_IPO)
    cmake_policy(SET CMP0069 NEW)
    include(CheckIPOSupported)
    check_ipo_supported(RESULT IPO_SUPPORTED OUTPUT IPO_NOT_SUPPORTED)
    if(IPO_SUPPORTED)
        message(STATUS "IPO/LTO is supported, enabling")
        set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
    else()
        message(STATUS "IPO/LTO is not supported: <${IPO_NOT_SUPPORTED}>")
    endif()
else()
    message(STATUS "IPO/LTO not enabled.")
endif()

# Check that submodules are present only if source was downloaded with git
if (EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/.git" AND NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/boost/boost")
    message (FATAL_ERROR "Submodules are not initialized. Run\n\tgit submodule update --init --recursive")
endif ()

include (cmake/find/ccache.cmake)

if (NOT CMAKE_BUILD_TYPE OR CMAKE_BUILD_TYPE STREQUAL "None")
    message (STATUS "CMAKE_BUILD_TYPE is not set, set to default = RELWITHDEBINFO")
    set (CMAKE_BUILD_TYPE "RELWITHDEBINFO")
endif ()
string(TOUPPER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_UC)
message (STATUS "CMAKE_BUILD_TYPE: ${CMAKE_BUILD_TYPE}")


option (USE_STATIC_LIBRARIES "Set to FALSE to use shared libraries" ON)
option (MAKE_STATIC_LIBRARIES "Set to FALSE to make shared libraries" ${USE_STATIC_LIBRARIES})
if (NOT MAKE_STATIC_LIBRARIES)
    option (SPLIT_SHARED_LIBRARIES "DEV ONLY. Keep all internal libs as separate .so for faster linking" OFF)
    option (CLICKHOUSE_SPLIT_BINARY "Make several binaries instead one bundled (clickhouse-server, clickhouse-client, ... )" OFF)
endif ()

if (MAKE_STATIC_LIBRARIES AND SPLIT_SHARED_LIBRARIES)
    message(FATAL_ERROR "Defining SPLIT_SHARED_LIBRARIES=1 without MAKE_STATIC_LIBRARIES=0 has no effect.")
endif()

if (NOT MAKE_STATIC_LIBRARIES AND SPLIT_SHARED_LIBRARIES)
    set(BUILD_SHARED_LIBS 1 CACHE INTERNAL "")
endif ()

if (USE_STATIC_LIBRARIES)
    list(REVERSE CMAKE_FIND_LIBRARY_SUFFIXES)
endif ()

option (ENABLE_FUZZING "Enables fuzzing instrumentation" OFF)

if (ENABLE_FUZZING)
    message (STATUS "Fuzzing instrumentation enabled")
    set (WITH_COVERAGE ON)
    set (SANITIZE "libfuzzer")
endif()

include (cmake/sanitize.cmake)


if (CMAKE_GENERATOR STREQUAL "Ninja")
    # Turn on colored output. https://github.com/ninja-build/ninja/wiki/FAQ
    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fdiagnostics-color=always")
    set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fdiagnostics-color=always")
endif ()

if (NOT MSVC)
    set (COMMON_WARNING_FLAGS "${COMMON_WARNING_FLAGS} -Wall")    # -Werror is also added inside directories with our own code.
endif ()

if (COMPILER_GCC OR COMPILER_CLANG)
    set (CXX_WARNING_FLAGS "${CXX_WARNING_FLAGS} -Wnon-virtual-dtor")
endif ()

if (COMPILER_GCC AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER "8.3.0")
    # Warnings in protobuf generating
    set (CXX_WARNING_FLAGS "${CXX_WARNING_FLAGS} -Wno-array-bounds")
endif ()

if (COMPILER_CLANG)
    # clang: warning: argument unused during compilation: '-specs=/usr/share/dpkg/no-pie-compile.specs' [-Wunused-command-line-argument]
    set (COMMON_WARNING_FLAGS "${COMMON_WARNING_FLAGS} -Wno-unused-command-line-argument")
    # generate ranges for fast "addr2line" search
    if (NOT CMAKE_BUILD_TYPE_UC STREQUAL "RELEASE")
        set(COMPILER_FLAGS "${COMPILER_FLAGS} -gdwarf-aranges")
    endif ()
endif ()

option (ENABLE_TESTS "Enables tests" ON)

if (ARCH_AMD64)
    option (USE_INTERNAL_MEMCPY "Use internal implementation of 'memcpy' function instead of provided by libc. Only for x86_64." ON)
endif ()

if (OS_LINUX AND NOT UNBUNDLED AND MAKE_STATIC_LIBRARIES AND NOT SPLIT_SHARED_LIBRARIES AND CMAKE_VERSION VERSION_GREATER "3.9.0")
    option (GLIBC_COMPATIBILITY "Set to TRUE to enable compatibility with older glibc libraries. Only for x86_64, Linux. Implies USE_INTERNAL_MEMCPY." ON)
endif ()

if (NOT CMAKE_VERSION VERSION_GREATER "3.9.0")
    message (WARNING "CMake version must be greater than 3.9.0 for production builds.")
endif ()

# Make sure the final executable has symbols exported
set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -rdynamic")

option (ADD_GDB_INDEX_FOR_GOLD "Set to add .gdb-index to resulting binaries for gold linker. NOOP if lld is used." 0)
if (NOT CMAKE_BUILD_TYPE_UC STREQUAL "RELEASE")
    if (LINKER_NAME STREQUAL "lld")
        set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gdb-index")
        set (CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--gdb-index")
        message (STATUS "Adding .gdb-index via --gdb-index linker option.")
    # we use another tool for gdb-index, because gold linker removes section .debug_aranges, which used inside clickhouse stacktraces
    # http://sourceware-org.1504.n7.nabble.com/gold-No-debug-aranges-section-when-linking-with-gdb-index-td540965.html#a556932
    elseif (LINKER_NAME STREQUAL "gold" AND ADD_GDB_INDEX_FOR_GOLD)
        find_program (GDB_ADD_INDEX_EXE NAMES "gdb-add-index" DOC "Path to gdb-add-index executable")
        if (NOT GDB_ADD_INDEX_EXE)
            set (USE_GDB_ADD_INDEX 0)
            message (WARNING "Cannot add gdb index to binaries, because gold linker is used, but gdb-add-index executable not found.")
        else()
            set (USE_GDB_ADD_INDEX 1)
            message (STATUS "gdb-add-index found: ${GDB_ADD_INDEX_EXE}")
        endif()
    endif ()
endif()

cmake_host_system_information(RESULT AVAILABLE_PHYSICAL_MEMORY QUERY AVAILABLE_PHYSICAL_MEMORY) # Not available under freebsd
if(NOT AVAILABLE_PHYSICAL_MEMORY OR AVAILABLE_PHYSICAL_MEMORY GREATER 8000)
    option(COMPILER_PIPE "-pipe compiler option [less /tmp usage, more ram usage]" ON)
endif()
if(COMPILER_PIPE)
    set(COMPILER_FLAGS "${COMPILER_FLAGS} -pipe")
else()
    message(STATUS "Disabling compiler -pipe option (have only ${AVAILABLE_PHYSICAL_MEMORY} mb of memory)")
endif()

if(NOT DISABLE_CPU_OPTIMIZE)
    include(cmake/cpu_features.cmake)
endif()

if(NOT COMPILER_CLANG) # clang: error: the clang compiler does not support '-march=native'
    option(ARCH_NATIVE "Enable -march=native compiler flag" ${ARCH_ARM})
endif()

if (ARCH_NATIVE)
    set (COMPILER_FLAGS "${COMPILER_FLAGS} -march=native")
endif ()

# cmake < 3.12 doesn't supoprt 20. We'll set CMAKE_CXX_FLAGS for now
# set (CMAKE_CXX_STANDARD 20)
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++2a")
set (CMAKE_CXX_EXTENSIONS 0) # https://cmake.org/cmake/help/latest/prop_tgt/CXX_EXTENSIONS.html#prop_tgt:CXX_EXTENSIONS
set (CMAKE_CXX_STANDARD_REQUIRED ON)

if (COMPILER_GCC OR COMPILER_CLANG)
    # Enable C++14 sized global deallocation functions. It should be enabled by setting -std=c++14 but I'm not sure.
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsized-deallocation")
endif ()

option(WITH_COVERAGE "Build with coverage." 0)
if(WITH_COVERAGE AND COMPILER_CLANG)
   set(COMPILER_FLAGS "${COMPILER_FLAGS} -fprofile-instr-generate -fcoverage-mapping")
   # If we want to disable coverage for specific translation units
   set(WITHOUT_COVERAGE "-fno-profile-instr-generate -fno-coverage-mapping")
endif()
if(WITH_COVERAGE AND COMPILER_GCC)
   set(COMPILER_FLAGS "${COMPILER_FLAGS} -fprofile-arcs -ftest-coverage")
   set(COVERAGE_OPTION "-lgcov")
   set(WITHOUT_COVERAGE "-fno-profile-arcs -fno-test-coverage")
endif()

set (CMAKE_BUILD_COLOR_MAKEFILE          ON)
set (CMAKE_CXX_FLAGS                     "${CMAKE_CXX_FLAGS} ${COMPILER_FLAGS} ${PLATFORM_EXTRA_CXX_FLAG} ${COMMON_WARNING_FLAGS} ${CXX_WARNING_FLAGS}")
set (CMAKE_CXX_FLAGS_RELWITHDEBINFO      "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -O3 ${CMAKE_CXX_FLAGS_ADD}")
set (CMAKE_CXX_FLAGS_DEBUG               "${CMAKE_CXX_FLAGS_DEBUG} -O0 -g3 -ggdb3 -fno-inline ${CMAKE_CXX_FLAGS_ADD}")

set (CMAKE_C_FLAGS                       "${CMAKE_C_FLAGS} ${COMPILER_FLAGS} ${COMMON_WARNING_FLAGS} ${CMAKE_C_FLAGS_ADD}")
set (CMAKE_C_FLAGS_RELWITHDEBINFO        "${CMAKE_C_FLAGS_RELWITHDEBINFO} -O3 ${CMAKE_C_FLAGS_ADD}")
set (CMAKE_C_FLAGS_DEBUG                 "${CMAKE_C_FLAGS_DEBUG} -O0 -g3 -ggdb3 -fno-inline ${CMAKE_C_FLAGS_ADD}")

if (COMPILER_CLANG)
    # Exception unwinding doesn't work in clang release build without this option
    # TODO investigate that
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-omit-frame-pointer")
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fno-omit-frame-pointer")
endif ()

option (ENABLE_LIBRARIES "Enable all libraries (Global default switch)" ON)

option (UNBUNDLED "Try find all libraries in system. We recommend to avoid this mode for production builds, because we cannot guarantee exact versions and variants of libraries your system has installed. This mode exists for enthusiastic developers who search for trouble. Also it is useful for maintainers of OS packages." OFF)
if (UNBUNDLED)
    set(NOT_UNBUNDLED 0)
else ()
    set(NOT_UNBUNDLED 1)
endif ()

# Using system libs can cause lot of warnings in includes (on macro expansion).
if (UNBUNDLED OR NOT (OS_LINUX OR APPLE) OR ARCH_32)
    option (NO_WERROR "Disable -Werror compiler option" ON)
endif ()

# Make this extra-checks for correct library dependencies.
if (OS_LINUX AND NOT SANITIZE)
    set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--no-undefined")
    set (CMAKE_SHARED_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--no-undefined")
endif ()

include(cmake/dbms_glob_sources.cmake)

if (OS_LINUX)
    include(cmake/linux/default_libs.cmake)
elseif (OS_DARWIN)
    include(cmake/darwin/default_libs.cmake)
endif ()

######################################
### Add targets below this comment ###
######################################

string (TOUPPER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_UC)
set (CMAKE_POSTFIX_VARIABLE "CMAKE_${CMAKE_BUILD_TYPE_UC}_POSTFIX")

if (MAKE_STATIC_LIBRARIES)
    set (CMAKE_POSITION_INDEPENDENT_CODE OFF)
    if (OS_LINUX)
        # Slightly more efficient code can be generated
        set (CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -fno-pie")
        set (CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO} -fno-pie")
        set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-no-pie")
    endif ()
else ()
    set (CMAKE_POSITION_INDEPENDENT_CODE ON)
endif ()

# Using "include-what-you-use" tool.
option (USE_INCLUDE_WHAT_YOU_USE "Use 'include-what-you-use' tool" OFF)
if (USE_INCLUDE_WHAT_YOU_USE)
    find_program(IWYU_PATH NAMES include-what-you-use iwyu)
    if (NOT IWYU_PATH)
        message(FATAL_ERROR "Could not find the program include-what-you-use")
    endif()
    if (${CMAKE_VERSION} VERSION_LESS "3.3.0")
        message(FATAL_ERROR "include-what-you-use requires CMake version at least 3.3.")
    endif()
endif ()

# Using clang-tidy static analyzer http://mariobadr.com/using-clang-tidy-with-cmake-36.html https://cmake.org/cmake/help/v3.6/prop_tgt/LANG_CLANG_TIDY.html
option (ENABLE_CLANG_TIDY "Use 'clang-tidy' static analyzer" OFF)
if (ENABLE_CLANG_TIDY)
    if (${CMAKE_VERSION} VERSION_LESS "3.6.0")
        message(FATAL_ERROR "clang-tidy requires CMake version at least 3.6.")
    endif()
    find_program (CLANG_TIDY_EXE NAMES "clang-tidy" DOC "Path to clang-tidy executable")
    if (NOT CLANG_TIDY_EXE)
        set (USE_CLANG_TIDY 0)
        message (STATUS "clang-tidy not found.")
    else ()
        set (USE_CLANG_TIDY 1)
        message (STATUS "clang-tidy found: ${CLANG_TIDY_EXE}")
        set (DO_CLANG_TIDY "${CLANG_TIDY_EXE}" "-checks=*,-clang-analyzer-alpha.*")
        # You can enable it within a directory by: set (CMAKE_CXX_CLANG_TIDY "${DO_CLANG_TIDY}")
    endif ()
endif ()

if (ENABLE_TESTS)
    message (STATUS "Tests are enabled")
endif ()
enable_testing() # Enable for tests without binary

# when installing to /usr - place configs to /etc but for /usr/local place to /usr/local/etc
if (CMAKE_INSTALL_PREFIX STREQUAL "/usr")
    set (CLICKHOUSE_ETC_DIR "/etc")
else ()
    set (CLICKHOUSE_ETC_DIR "${CMAKE_INSTALL_PREFIX}/etc")
endif ()

message (STATUS "Building for: ${CMAKE_SYSTEM} ${CMAKE_SYSTEM_PROCESSOR} ${CMAKE_LIBRARY_ARCHITECTURE} ; USE_STATIC_LIBRARIES=${USE_STATIC_LIBRARIES} MAKE_STATIC_LIBRARIES=${MAKE_STATIC_LIBRARIES} SPLIT_SHARED=${SPLIT_SHARED_LIBRARIES} UNBUNDLED=${UNBUNDLED} CCACHE=${CCACHE_FOUND} ${CCACHE_VERSION}")

include(GNUInstallDirs)
include (cmake/contrib_finder.cmake)
include (cmake/lib_name.cmake)

find_contrib_lib(double-conversion) # Must be before parquet
include (cmake/find/ssl.cmake)
include (cmake/find/icu.cmake)
include (cmake/find/boost.cmake)
include (cmake/find/zlib.cmake)
include (cmake/find/zstd.cmake)
include (cmake/find/ltdl.cmake) # for odbc
include (cmake/find/termcap.cmake)
include (cmake/find/odbc.cmake)
# openssl, zlib, odbc before poco
include (cmake/find/poco.cmake)
include (cmake/find/lz4.cmake)
include (cmake/find/xxhash.cmake)
include (cmake/find/sparsehash.cmake)
include (cmake/find/rt.cmake)
include (cmake/find/execinfo.cmake)
include (cmake/find/readline_edit.cmake)
include (cmake/find/re2.cmake)
include (cmake/find/libgsasl.cmake)
include (cmake/find/rdkafka.cmake)
include (cmake/find/capnp.cmake)
include (cmake/find/llvm.cmake)
include (cmake/find/h3.cmake)
include (cmake/find/cpuid.cmake) # Freebsd, bundled
if (NOT USE_CPUID)
    include (cmake/find/cpuinfo.cmake) # Debian
endif()
include (cmake/find/libxml2.cmake)
include (cmake/find/brotli.cmake)
include (cmake/find/protobuf.cmake)
include (cmake/find/pdqsort.cmake)
include (cmake/find/hdfs3.cmake) # uses protobuf
include (cmake/find/s3.cmake)
include (cmake/find/consistent-hashing.cmake)
include (cmake/find/base64.cmake)
include (cmake/find/parquet.cmake)
include (cmake/find/hyperscan.cmake)
include (cmake/find/simdjson.cmake)
include (cmake/find/rapidjson.cmake)
include (cmake/find/fastops.cmake)
include (cmake/find/orc.cmake)

find_contrib_lib(cityhash)
find_contrib_lib(farmhash)
find_contrib_lib(metrohash)
find_contrib_lib(btrie)

if (ENABLE_TESTS)
    include (cmake/find/gtest.cmake)
endif ()

# Need to process before "contrib" dir:
include (libs/libcommon/cmake/find_jemalloc.cmake)
include (libs/libcommon/cmake/find_cctz.cmake)
include (libs/libmysqlxx/cmake/find_mysqlclient.cmake)

# When testing for memory leaks with Valgrind, don't link tcmalloc or jemalloc.

if (USE_JEMALLOC)
    message (STATUS "Link jemalloc: ${JEMALLOC_LIBRARIES}")
    set (MALLOC_LIBRARIES ${JEMALLOC_LIBRARIES})
elseif (SANITIZE)
    message (STATUS "Will use ${SANITIZE} sanitizer.")
elseif (OS_LINUX)
    message (WARNING "Non default allocator is disabled. This is not recommended for production Linux builds.")
endif ()

include (cmake/print_flags.cmake)

if (TARGET global-group)
    install (EXPORT global DESTINATION cmake)
endif ()

add_subdirectory (contrib EXCLUDE_FROM_ALL)

macro (add_executable target)
    # invoke built-in add_executable
    # explicitly acquire and interpose malloc symbols by clickhouse_malloc
    _add_executable (${ARGV} $<TARGET_OBJECTS:clickhouse_malloc>)
    get_target_property (type ${target} TYPE)
    if (${type} STREQUAL EXECUTABLE)
        # operator::new/delete for executables (MemoryTracker stuff)
        target_link_libraries (${target} PRIVATE clickhouse_new_delete ${MALLOC_LIBRARIES})
    endif()
endmacro()

add_subdirectory (libs)
add_subdirectory (utils)
add_subdirectory (dbms)

include (cmake/print_include_directories.cmake)
